AD7322
TABLE OF CONTENTS
Features .............................................................................................. 1
Control Register ......................................................................... 22
Range Register ............................................................................ 24
Sequencer Operation ..................................................................... 2±
Reference ..................................................................................... 26
VDRIVE ............................................................................................ 26
Modes of Operation ....................................................................... 27
Normal Mode (PM1 = PMꢀ = ꢀ) ............................................. 27
Full Shutdown Mode (PM1 = PMꢀ = 1) ................................. 27
Autoshutdown Mode (PM1 = 1, PMꢀ = ꢀ)............................. 28
Autostandby Mode (PM1 = ꢀ, PMꢀ = 1) ................................ 28
Power vs. Throughput Rate....................................................... 29
Serial Interface ................................................................................ 3ꢀ
Microprocessor Interfacing........................................................... 31
AD7322 to ADSP-21xx.............................................................. 31
AD7322 to ADSP-BF±3x........................................................... 31
Application Hints ........................................................................... 32
Layout and Grounding .............................................................. 32
Power Supply Configuration .................................................... 32
Outline Dimensions....................................................................... 33
Ordering Guide .......................................................................... 33
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications .................................................................. 6
Absolute Maximum Ratings............................................................ 7
ESD Caution.................................................................................. 7
Pin Configuration and Function Descriptions............................. 8
Typical Performance Characteristics ............................................. 9
Terminology .................................................................................... 13
Theory of Operation ...................................................................... 1±
Circuit Information.................................................................... 1±
Converter Operation.................................................................. 1±
Analog Input Structure.............................................................. 16
Typical Connection Diagram ................................................... 18
Analog Input ............................................................................... 18
Driver Amplifier Choice............................................................ 2ꢀ
Registers........................................................................................... 21
Addressing Registers.................................................................. 21
REVISION HISTORY
1/10—Rev. 0 to Rev. A
Changes to Power Requirements, Normal Mode (Operational),
Changes to Figure 4ꢀ and Figure 41............................................. 2ꢀ
Changes to Autostandby Mode (PM1 = ꢀ, PM = 1) Section.... 28
Changes to Table 14 and Table 1± ................................................ 31
Added Power Supply Configuration Section.............................. 32
Added Table 16; Renumbered Sequentially................................ 32
Added Figure ±3; Renumbered Sequentially .............................. 32
Updated Outline Dimensions....................................................... 33
I
CC and IDRIVE Parameter; and Power Dissipation, Normal Mode
Parameter, Table 2............................................................................. ±
Changes to Endnote 1, Table 4........................................................ 7
Changes to Table 6.......................................................................... 1±
Changes to Figure 2± and Figure 26............................................. 16
Changes to Figure 3ꢀ and Figure 31............................................. 17
Changes to Figure 33 and Figure 34............................................. 18
Changes to Figure 39...................................................................... 19
12/05—Revision 0: Initial Version
Rev. A | Page 2 of 36
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